Finding the Fourth Proportional to 3,602.55, 5,401.95 and 1,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,602.55 : 5,401.95 = 1,380.72 : x
2. Step 2: Convert to fraction form
   3,602.55/5,401.95 = 1,380.72/x
3. Step 3: Cross multiply
   3,602.55x = 5,401.95 × 1,380.72
4. Step 4: Simplify right side
   3,602.55x = 7,458,580.40
5. Step 5: Solve for x
   x = 7,458,580.40/3,602.55
6. Step 6: Final answer
   x = 2,070.36